Consolidate all moonweb.org sites under www.moonweb.org

- Migrate timecapsule (old www.moonweb.org) into monorepo as Eleventy 2.x site
- Change all site URLs from subdomains to subdirectories under www.moonweb.org
- Replace Cloudflare Pages deployment with IONOS SFTP
- Update site-switcher, footer, and all internal links
- Add merge script for combining all sites into single deployment
- Update CI/CD workflow for IONOS SFTP deployment
- Update stefankoelle.de references to use new URLs
- Update AGENTS.md and README.md documentation

hub/index.njk

@@ -9,19 +9,19 @@ sections:
     cards:
       - title: "infra"
         summary: "Stack overview: Proxmox, Synology, network, backups, and how I work."
-        href: "https://infra.moonweb.org"
+        href: "/infra/"
         emoji: "🏗️"
       - title: "smarthome"
         summary: "What's actually running on the homelab, and why."
-        href: "https://smarthome.moonweb.org"
+        href: "/smarthome/"
         emoji: "🏠"
       - title: "code"
         summary: "Curated catalog of my GitHub projects."
-        href: "https://code.moonweb.org"
+        href: "/code/"
         emoji: "💻"
       - title: "retro"
         summary: "Physical retro hardware collection."
-        href: "https://retro.moonweb.org"
+        href: "/retro/"
         emoji: "🕹️"
   - heading: "About me"
     cards:
@@ -37,7 +37,7 @@ sections:
         emoji: "💾"
       - title: "www.moonweb.org"
         summary: "The 2000s internet projects, networking and engineering."
-        href: "https://www.moonweb.org"
+        href: "/timecapsule/"
         emoji: "🌐"
       - title: "inseco.de"
         summary: "Internet services & consulting for gastronomy and clubs, Peak 2003–2008. Custom PHP/CMS."
@@ -63,7 +63,7 @@ sections:
 <section class="about-expanded">
   <h2>What this site is about</h2>
   <p>moonweb is a collection of personal projects that have grown over the past 25 years. What started as a single 486 running a BBS in the mid-90s has turned into a full homelab with Proxmox, Docker, smart home automation, and a growing collection of retro hardware. The name "moonweb" comes from the original domain moonweb.org, which has been online since 2000.</p>
-  <p>Each section of this site documents a different part of the setup. The <a href="https://infra.moonweb.org">infrastructure section</a> covers the Proxmox cluster, Synology NAS, Docker containers, networking, and backup strategies. The <a href="https://smarthome.moonweb.org">smart home section</a> shows what automation projects are running, from Tasmota energy monitoring to MQTT sensors and AirPlay audio. The <a href="https://code.moonweb.org">code section</a> lists the public GitHub projects that power these setups, and the <a href="https://retro.moonweb.org">retro section</a> documents the hardware collection.</p>
+  <p>Each section of this site documents a different part of the setup. The <a href="/infra/">infrastructure section</a> covers the Proxmox cluster, Synology NAS, Docker containers, networking, and backup strategies. The <a href="/smarthome/">smart home section</a> shows what automation projects are running, from Tasmota energy monitoring to MQTT sensors and AirPlay audio. The <a href="/code/">code section</a> lists the public GitHub projects that power these setups, and the <a href="/retro/">retro section</a> documents the hardware collection.</p>
 
   <h2>What I do professionally</h2>
   <p>I work as a Senior Software Developer &amp; Architect at TENHIL GmbH (formerly stellenanzeigen.de), where I build and maintain microservices on .NET Core and Kubernetes. My day job involves designing cloud-native architectures, building APIs, and migrating legacy applications to modern stacks. I've been working with .NET since the early 2000s and have used everything from ASP Classic to the latest .NET 8 features.</p>